The current work emphasizes the characterization of inter-columnar macro-segregation in as-cast samples from continuously cast steel slabs and their segregation level in the rolled products. Based on the literature studies, and understanding from the characterization of steel samples, the formation mechanism and possible causes of inter-columnar segregation have been elucidated. It is observed that macro-segregation happens as a result of the breakage of columnar dendrites in the low ductility region of steel between zero ductile temperature (ZDT) and zero strength temperature (ZST). The external tensile strain has been observed in the form of strain rate due to the cumulative strain of bulging, straightening, and misalignment which exceeds the critical strain of steel causing crack formation at the low ductility region. The inherent critical strain is determined from the interval of ZDT and ZST region which is decided by the segregation of solute elements based on the steel composition. To some extent, the current work elucidates the effect of solute elements on the critical strain and most importantly on segregation of sulphur and phosphorus in liquid has been simulated using Scheil solidification model in Thermo-Calc software. However, the segregation of sulphur leads to the formation of manganese sulphide, whereas steels having a phosphorus level of more than 0.016% enhance the crack formation resulting in inter-columnar segregation, which is in good agreement with the plant data and experimental studies with other researchers.

当前的工作强调连续铸造钢坯铸态样品中柱间宏观偏析的特征及其在轧制产品中的偏析水平。根据文献研究，并从对钢样品的表征了解中，阐明了柱间偏析的形成机理和可能的原因。观察到宏观偏析是由于在低延性温度（ZDT）和零强度温度（ZST）之间的钢的低延展性区域中柱状枝晶的断裂而发生的。由于凸出，矫直和未对准的累积应变超过了钢的临界应变，导致了在低延展性区域形成裂纹，因此以应变率的形式观察到了外部拉伸应变。固有临界应变由ZDT和ZST区域的间隔确定，该间隔由基于钢成分的溶质元素的偏析决定。目前的工作在一定程度上阐明了溶质元素对临界应变的影响，最重要的是，已使用Thermo-Calc软件中的Scheil凝固模型模拟了溶质元素对液体中硫和磷的离析。但是，硫的偏析会导致硫化锰的形成，而磷含量超过0.016％的钢会增强裂纹的形成，导致柱间偏析，这与工厂数据和其他实验研究非常吻合。研究人员。